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They seized on forgotten pledges to rein in European courts, kick out failed jobseekers and make changes to restrictive treaties.

Several of the commitments were in Tory manifestos, but never came true after Mr Cameron was elected.

In a furious attack the Vote Leave chief executive also accused the Prime Minister of exaggerating the significance of the concessions contained in his draft deal.

Reuters

Mr Cameron spent Friday night at a dinner in Hamburg with Angela Merkel

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Mr Cameron signed a welcome book in Hamburg, but is he also signing away Britain's sovereignty?

Commitments that Britain is not shackled to "ever-closer union" and confirmation that non-Euro nations cannot be discriminated against are nothing more than an extension of the status quo, he blasted.

In a stinging critique of the Prime Minister's diplomatic skills, Matthew Elliott said the deal is proof that Mr Cameron has not "negotiated hard" for Britain.

Mr Elliott also said that commitments to cut red tape burdens on business and boost competitiveness are "unlikely to have any tangible impact".

His Vote Leave group also criticised the Prime Minister for failing to make good on pledges to secure reforms in ten areas that he has raised during his time as Conservative leader, including nailing down treaty change before a referendum and powers to stop jobless migrants moving to the UK.

EPA

The PM has spent months touring Europe trying to drum up support for his EU deal

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The criticisms came from the Vote Leave campaign

Mr Elliott raged: "David Cameron has asked for very little from the EU, his renegotiation is almost entirely cosmetic. Asking the EU to confirm that the status quo continues - like that the pound is the UK's currency - is not going to persuade anyone that he has negotiated hard for Britain.

"Many of the changes he is asking for require treaty change. He is effectively asking the British people to vote for something that has no more value than an unsigned contract.